Registration Dossier
Registration Dossier
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EC number: 273-227-8 | CAS number: 68953-84-4
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
The boiling point could not be determined as the Differential Scanning Calorimetry experiment showed that the substance decomposed before the boiling point was reached.
Key value for chemical safety assessment
Additional information
During the manufacture of DAPD, the chemical is heat-stripped to remove the more volatile starting materials remaining as residues in the product. The temperature for this process exceeds 325 degrees C while a vacuum is created in the stripper to pressure levels below 2 psi. Under these extreme conditions, the product is melted without indication for boiling. These process conditions correspond to a corrected temperature of more than 415 °C at atmospheric pressure according to recalculation using a nomogram. As shown in the Differential Scanning Calorimetry experiment, the substance decomposes at 350°C. As a consequence, it is not possible to define an exact boiling point for DAPD.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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